Stool



FIG. 1 is a top perspective view of the stool showing my new design;

FIG. 2 is a bottom perspective view;

FIG. 3 is a front view with the back view being a mirror image thereof;

FIG. 4 is a left side view with the right side being a mirror image thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a top view of my new design. 

CLAIM The ornamental design for a stool, as shown and described. 